1. “Longyear Museum is an independent historical museum dedicated to advancing the understanding of the life and work of Mary Baker Eddy, the Discoverer, Founder, and Leader of Christian Science,” Longyear Mission Statement, https://www.longyear.org/about/ accessed 4/13/2020
  2. Historical Files Overview, https://www.longyear.org/wp-content/uploads/2018/06/Historical-Files-Overview.pdf, accessed 4/13/2020
  3. Richard C. Molloy, “Joseph and Mary Armstrong,” Quarterly News, Mary Baker Eddy Museum and Historic Sites, vol. 12, no. 2, p. 182, https://www.longyear.org/wp-content/uploads/2018/03/LY_1975_Vol_12_No_2_Summer_QN.pdf, accessed 4/13/2020
  4. The Onward and Upward Chain: Pioneers of Christian Science in the 1880s. Longyear Museum, 2004.